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You can relock the phone and flash the ruu. it wont work with an unlocked bootloader. The easiest method is to download the right RUU file for you phone. Check that by-

Enter fastboot on phone.

Open cmd on PC

-fastboot oem readcid

then you need to flash stock boot.img Search the forum, stock boot.img are all over here and place it in the fastboot directory.

-fastboot flash boot boot.img

and then relock bootloader.

-fastboot oem lock

make sure you download the right RUU for your CID.

Once you have it flash it.